Treatment of waste spun or woven textile material



has for its tion of a solution containin Patented Nov. 11, 1930 PATENT OFFICE ADOLPH LIONEL BURLIN, OF LONDON, ENGLAND TREATMENT OF WASTE SPUN OR WOVEN TEXTILE MATERIAL No Drawing. Applicatiomflled October 26, 1929, Serial No. 402,810, and in Great Britain November 2,

This invention relates to the treatment of waste spun or woven material arising in textile works, garment factories or the like or which are obtained from rag merchants and object to provide an improved method of treating such waste containing silk, wool, artificial silk, cotton or other fibres in order to obtain therefrom fibres adapted to be respun into yarns with or without the addition of virgin fibre.

The invention is mainly concerned with the treatment of waste spun or woven material containing artificial silk in connection with which the known processes of treating the same have resulted in crude and unsatisfactory results in that the original lustre oi the artificial silk is lost and spinners have experienced dificulty in treating the cardedartificial silk fibre.

According to the present invention, the waste is subjected to the action of aqueous detergents and before or after treatment in an opening carder is treated with a weak acid, for instance boric acid, and dextrine or soluble starch or the like.

After being subjected to the action ot a detergent the textile waste may be treated with a solution of a neutral salt for instance, sodium sulphate.

Further, in accordance with the invention, it the waste treated consists of or contains a material proportion of artificial silk the same is advantageously subjected to the acacid ammonium phosphate in addition to oric acid.

if the waste contains cotton fibre which it desired to return in an uninjured state the above-mentioned treatment with acid ammonium phosphate should however be omitted.

Normally the material which will be treated in accordance with the invention will be received in the form of bales which will be opened up and may be disinfected, for instance, by the aid of formaldehyde.

The waste may also be beaten to remove .dust prior to treatment with a detergent.

The order of the mechanical and other treatments to which the material is subjected may be varied within certain limits. For instance, the Waste material after treatment to remove dust and washing with a detergent maybe treated with a solution of sodium sulphate and dried, the washed and dried material being then cut up into suitable sized fragments which by means of machines of generally known character are disintegrated or opened up, the fibrous material obtained being carded and subjected to the action of a solution containing essentially a weak acid, 0

and dextrine or soluln treating, for instance, waste rags consisting wholly or mainly of artificial silk the rags may be freed from dust or dirt by mechanical processes, sorted with the aid, for instance, of an endless belt conveyor, cut'up into pieces of 2 or 3 inches in length by a rag-cutting ma- 0 chine, such for instance as is used in a fine paper factory.

The cut rags are then opened up by treatment with an opening carding machine, washed in warm water suitable detergents, for instance, soap flakes, dyed if necessary, to obtain a uniformly coloured product, and dipped into a solution con taining a weak acid and a proportion of solubis starch.

This dipping may be carried out by treating the fibre with a solution containing 1 oz. of boric acid and oz. soluble starch to each 10 gallons of cold water and as indicated this solution may also contain acid ammonium phosphate.

After treatment in such a solution for a relatively brief period, for example, ten minutes,

the waste is taken out, lightly pressed and cotton, the solution em- 5 the invention, the solu- 70 with the addition of 85 treatment to which 35 the action of aqueous so treatin eo per litre acid ammonium phosphate,

. 'for spinning are produced.

Yarns of fine counts can be spun from the finished fibres on a cotton spinning machine while the coarser yarns may be'spun on worsted spinning machines and in the spun condition the yarns may be used for difi'erent purposes either alone or in association with real silk, cotton, wool or linen so as to obtain products of high or low lustre.

As will be understood the above description is furnished for the purpose of describing the nature of the invention and certain detailed methods of carrying the invention into effect. Various changes, however,-may be made in the the waste or the fibres are subjected without exceeding the scope of the present application.

Having now described my invention what I claim as new and desire to secure by Letten Patent is 1. The process of treating waste spun or woven material containing artificial silk which comprises subjecting the material to P I ment wlth borlc acld, acid ammonium phosthe action of aqueous detergents and there- 7 after treating the same with an acid body in.-'

cluding boric acid, and a carbohydrate. 2. The process of treating waste spun or woven material containing artificial silk which comprises subjecting the material to detergents subsequently treatin the same with a neutral salt and therea er subjecting it to treatment with an acid body including boric acid and a carbohydrate.

3. The process of treating waste spun or woven material containing artificial. silk which comprises subjecting the material to the action of aqueous detergents and thereafter tre'atin the same with boric acid, acid 5 ammonium p osphate and soluble starch.

4. The process of treatihg waste spun or woven material containing artificial silk which comprises subjecting the material to the action of aqueous detergents subsequently the same, with a neutral salt and therea er subjecting it to treatment with boric acid, acid ammonium phosphate and soluble starch.

5. The process of treating waste spun or woven material containing artificial silk which comprises subjecting the material to the action of a xueous detergents and thereafter treating '0 same with a solution containing .4' gram per litre boric acid, .4' gram an .2

gram r-litre of soluble starch. 6.. he process, of treating woven material containing which comprises slibjectin artificial silk the material to oaths action of aqueous etergents, subseoured product and waste spun or quently treating the same with a neutral salt -and thereafter treating it with a solution containing .4 gram per'litre boric acid, .4

gram per litre acid ammoniam phosphate, and .2 gram per litre soluble starch,

7. The process of treating waste spun or woven material containing artificial silk which comprises subjecting the material to the action of a solution of soap flakes in warm water dyed to obtain'a umformlycolthereafter'treating the same with an acid body including boric acid and a carbohydrate.

8. The process of treating waste spun or woven material which comprises subjectin the same to the action of an aqueous solution of soap flakes in warm water dyed coloured product, subsequently treating the same with a neutral'salt and thereafter subjecting it to treatment with an acid body including boric acid and a carbohydrate.

Y 9. The process of treating waste spunor woven material containing artificial silk which comprises subjecting the material to the action of a solution of soa flakes in warm water dyed to obtain a uni ormly coloured roduct and thereafter subjecting it to treatphate and soluble starch.

10. The process of treating waste spun or woven material containing artificial silk which comprises subjecting the material to the action of a solution of soa water dyed to obtain a uni ormly coloured product, subsequently treating the same with a neutral salt and thereafter subjecting it to treatment with boric acid, acid ammonium phosphate and soluble starch.

11 The process of treating waste spun or woven material containing artificial which. comprises subjecting the material to the action of a solution of soa flakes in warm water dyed to obtain a uni ormly coloured product, subsequently treating the same with a neutral salt and thereafter subjecting it to treatment with a solution containin .4:

gram per litre boric acid, .l gram per 'tre acid ammonium phosphate and .2 gram per litre soluble starch.

12. The process of treating waste spun or woven material containing artificial silk containing artificial silk to obtain a uniformly flakes in warm silk which comprises subjecting the material to 

